1 files changed, 89 insertions, 0 deletions
diff --git a/StdLib/LibC/Stdio/vsnprintf.c b/StdLib/LibC/Stdio/vsnprintf.c
new file mode 100644
index 0000000000..b2a2f63a91
--- /dev/null
+++ b/StdLib/LibC/Stdio/vsnprintf.c
@@ -0,0 +1,89 @@
+/*  $NetBSD: vsnprintf.c,v 1.20 2005/02/09 21:35:47 kleink Exp $  */
+
+/*-
+ * Copyright (c) 1990, 1993
+ *  The Regents of the University of California.  All rights reserved.
+ *
+ * This code is derived from software contributed to Berkeley by
+ * Chris Torek.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+#include  <LibConfig.h>
+#include <sys/EfiCdefs.h>
+#if defined(LIBC_SCCS) && !defined(lint)
+#if 0
+static char sccsid[] = "@(#)vsnprintf.c 8.1 (Berkeley) 6/4/93";
+#else
+__RCSID("$NetBSD: vsnprintf.c,v 1.20 2005/02/09 21:35:47 kleink Exp $");
+#endif
+#endif /* LIBC_SCCS and not lint */
+
+#include "namespace.h"
+
+#include <assert.h>
+#include <errno.h>
+#include <stdio.h>
+#include "reentrant.h"
+#include "local.h"
+
+#ifdef __weak_alias
+__weak_alias(vsnprintf,_vsnprintf)
+#endif
+
+int
+vsnprintf(str, n, fmt, ap)
+  char *str;
+  size_t n;
+  const char *fmt;
+  _BSD_VA_LIST_ ap;
+{
+  int ret;
+  FILE f;
+  struct __sfileext fext;
+  unsigned char dummy[1];
+
+  _DIAGASSERT(n == 0 || str != NULL);
+  _DIAGASSERT(fmt != NULL);
+
+  if ((int)n < 0) {
+    errno = EINVAL;
+    return (-1);
+  }
+
+  _FILEEXT_SETUP(&f, &fext);
+  f._file = -1;
+  f._flags = __SWR | __SSTR;
+  if (n == 0) {
+    f._bf._base = f._p = dummy;
+    f._bf._size = f._w = 0;
+  } else {
+    f._bf._base = f._p = (unsigned char *)str;
+    f._bf._size = f._w = n - 1;
+  }
+  ret = __vfprintf_unlocked(&f, fmt, ap);
+  *f._p = 0;
+  return (ret);
+}